Dental impression tray



@et 1&6, w23.' 1,470,888

v. c. SMI-:IDLEY DENTAL IMPRESSION TRAY Filed Maron 14. 1922 f glmwm Vicio? C ,Swed/90.

' Toall whom/tf may concern:

*Patented oct. 16,1923. 'ik

' '3 vieron CJLYDE sMEnLnY, or,inmitten,commend.A n

, DENTAL rtrrienssIon-usmlrg ,p f jappiiation iea'nrch y,14,1922, seriarnpI-siaeas;, Y

Be known'that I, Vieron CLYDE Sismo LEY, a citizen of. the0 UnitedY States',v residing at 'the ycityfandxcou'ntyof Denver and State., ofj Colorado, have invented certain newand useful"y Improvements in i Dental f Impression Trays; andi do declare the follo-Wingto be a' full, clear, andf exact description of the invention, such tas will enable lothers skilled in the'art tow'hich it appertains to make and ,use the; same, reference beingvhad tothe `LeconilpanyingV l virent/ings,i"k and to the char-l Y. y acters of' referencefmarked" thereon, *which forma part 'of this specification.. f 'This'linventiofn 'relates gto` improvements dental impression f trays, `and7 more particuf,

llly'fto", a"trayffadaptedf:to'be iilled with plastic mfaterialforthe purpose "of taking cult'ies are"encountere'd.f In the first place, 1 dueto the inaccessibility ofthe tooth inthe;y patientsmouth, itis difficult to applyfgthe'A 1 plastic jmaterialor to'l apply itin sullicientv lquantity to completely surround thetoothv y vvithoutspilling the same or rubbingit or Vamo'ld or, impression ota'toothin' thel mout-h ofa patient.

In dentistry, "infrequently is" desirable-ttoV w y v.shows myl tray 'in y'disassembledrelation; I

lobtain a'inodeloncastfof atoothor other formation yin themout-h of a patient. In order-tofohtainfsuch a cast," it :is necessary to Yapply plastick material .to ythe tooth ior otherf object in 4Lthe mouth'i to obtain anim-g pression of the same, then remo'vesuch plaslrticlmateria'l after'hardeningfand nally to cast .alfniod'elrfrmf' the"moldfthusobtained?l n y v the manner in xvvhiclrthel mold `is brokenA bpen v'for-the;purpose of removing it yfrom In carryingoiit 4such a process, severaldiiiiits'container against sensitive parts ofthe mouth. In thes'econd place, sin/ce'fthe tooth frequently is constricted at ythek neclnfit isV diiicult` toy remove thelllardened .impression material from the tooth Without deforming the molded impression. p Y l In my improved dental molding tray, kI

Y have'inventedA a device which overcomes the objections noted above.vr With my improved Y tray, it is Ypossible tovfhold a small lquantity yof plastic material but sufficient inl amount tocompletely surround the, tooth .or otherl object, the impression or' which is desired, readily insert such plasticimaterial into the mouth` without danger of loss, and Without danger of contact with or injury to othery parts of the mouth, force the plastic material -around the/tooth sothat a. clear,full

and distinct impression is obtained, and

land applied to Va tooth; and y l. u',Ffigigf is a section on line 3-43,.fshowing then remove such, plasticiA material from the tooth-*Without deforming the impressionobn tained, giving a 'mold'l in vvhichaV perfect y c astingmayfbe obtained." l.

-I accomplishthe above objectsfby means which consists broadly in the combination of ing# kspaced side" pieces which are adapted.,;"'

` In order .to more clearly describe my inimprovedtray Vinw assembled relation;

toengfag'e' theouter surfacesoithe vtray members -in a manner which' will be clearly s "shovvninl'the description Whichffollows. y 70 KK ventiornI shall have reference to theaccompanying dravvingin Which-V- f Fig."y 2 is aj'view 'fin s perspective which Fig. 4 isa sectionfsimilar to that shown in 3,but showing' the'ftray iilledWith the'tooth." ..1 .s *i* improved tray consists of'three parts A:

plaster orrotherplastic impression material est aholderorjhandle A, afrightfhand tray section Bfand'fa-lett hand tray-ysectionA VTray 1section B consists of 1a bottommember f g s `-1,7a side Vmember 2,2m end Wall B, and an fu'ps'tandinglrib formed by turning up the ytree-'ed'ge of 1 the bottom member 1. Tray memberV C-is identical .Withfmember eX- cept that'itis reversed With respect thereto,

-. so that the two members may rbe assembled "as shown to-form a receptacle for the recepff tion of the plaster or other plastic impres'y j Vsion material.` In ordery'to hold members B K andC in assembled relation, I provide the tek 4 handle A With a pair of similar-parallel upstanding; sides 5' and '6, Whicharerso spaced that they-willengage the outer surfaces of the tray members B andC. andA hold them securely in assembled relationin they manner clearly shown inFigs, 1,3 andy/4c.v It will be noted Vthat the sides 5 andl 6 are ymade with their engaging: surfaces lane, n and theparts are held inassembled re ation v by friction only, as by this .arrangement the parts canbe more easily assembled and separated, and the operation of'the device as well as its construction simplified thereby.

. When it is desired to utilize the tray for the purposek of taking an impression, the,k

- parts are assembled in the manner shown in vthefmouth of the patient-and pressesthe same over the tooth of which an impression is desired. f

In Figa l have shown4 my device infpjosition-about a toothgS. The "tray is left in place `for the length of time that it takes thefmaterial to se-t or` harden. When the material Tebas set, the handle A is removed,

Whichcan be readily. accoinplislied, asit' is held in place by frictiononl-y. With a suit- -able instrumentthe operator then-'exerts` a separating forceupon oneor bothfof--the sec'- tionsV B andC, fand spreads themf apart, thus causing` theimpression material /7 to crack l along the line of ribs 4, in ,themanner shown in' Fig. 5. The tray sections-may-then be removed from the -patients.- mouth, after which they -may be reassembled. They'may thenf'be used as a mold by means of whichv Castav i e anA Aexact;counterpart vof theftoothv mayA be The tool described above is of great prac- 51 l tical utility and of an extremely simplefconstruction.- The. parts can vbe entirely fseparatedxand. are so made that theyv maybe easily .cleaned and sterilized. The fmanner in ywhich my'handle is attached iseXtreme'ly v simple and yety it is thoroughly effective and has beeniprovenentirely satisfactory by a long series of practical ,demonstrations.l

y Having `non7 described my invention,;vvhat I claim; isflpfrxdental tray composedof similar tray membersy adapted ytobe br'ought ,to-

gether tov form ra rectangular parallelelpipedal-shaped receptacle having an open 'sidefor the. receptionA of impression matev rial, eachof said1 members having along the linel ofcontact f th'ebottomvparts thereof t v rial, and means for holding saidl members in assembled relation, said means comprising a handle liavingtivo spaced parallel proj ect-V` ing members adapted to Contact With the Vouter parallel surface 'of said tray members vabove the vbottom,thereof, the contact surfaces lofthe handlebeing of less areathan that of the outer surface of the. tray `members which they engage. y y 'y yh.

l2., A dental tray. .comprising separable halves each consisting of Va bottom me'mber, a side member, and ,an endfmember, said halves being adapted tobe brought together to kform a rectangular parallelepipedalshaped receptacle. for impression-material, thel adjacent kedges of'saidhalves being pro vided-With upstanding ribs` alda'ptedto 'form a linel of ,breakage o f theimpres'sionmateg rial, and means foi` holding s aid'hal'yesin cooperative relation, `said Lmeans consisting of a handle member provided. at oneend -with spacedl parallelsides adapted toffrictionallyf'engage the outer parallel surfaces of said halves above the bottoml and'y to be, I??

moved therefrom by sliding motion, the

gaging. surfaces of the handlebeing -ofjllesfs area than that` of the outer surface ofthe .tray parts Vwhich they engage. `1

y ,A rdental im resslonhtray .two parts,adapt ed when brought togetherto form an` open-sidedV receptaclegfor impression material, said parts havinga side, abot- `tomgandran end, there beingv angin'vvlardly yprojecting flange formedalong th'e,.l ineY of juncture: ofsaid. parts. and ,adapted tof,A produce a .weakened portion insaidfimpression material, andmeans for detachablygiholding theY aforesaid parts"together,v said means ,comprising a handle jhaving a portiony l,on veach' side "constructed to engage the tray f partslon opposite `,sides abovethe bottom and -holdsaid parts togetheron,said.handle, the ,engaging surfaces ofthe handlebeingof less area ,than thatof thelouter surface vof the tray parts which they engage. A ln testimony whereof I affix my signature.

vicini-t @treni Mente-v; 

